.page-about {
  --about-rule: 2px solid var(--ky-grid);
  --about-pad: clamp(16px, 3.4vw, 30px);
  background: var(--ky-void);
  color: var(--ky-body);
  font-family: var(--ky-font-body);
  overflow-x: hidden;
}

.page-about a {
  color: var(--ky-cyan);
}

/* ---------- 面包屑 ---------- */
.page-about .ky-breadcrumb {
  padding-top: clamp(14px, 3vw, 26px);
  padding-bottom: 0;
}

/* ================= 首屏 ================= */
.page-about .about-hero {
  position: relative;
  padding: clamp(14px, 3vw, 30px) 0 clamp(30px, 5vw, 60px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 5vw, 56px);
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-family: var(--ky-font-display);
  font-size: clamp(2.1rem, 8vw, 3.9rem);
  line-height: 1.06;
  letter-spacing: -0.012em;
  color: var(--ky-white);
  font-weight: 700;
}

.page-about .about-hero__lede {
  margin: clamp(16px, 3vw, 24px) 0 0;
  max-width: 62ch;
  font-size: clamp(1rem, 2.4vw, 1.0625rem);
  line-height: 1.85;
  color: var(--ky-body);
}

.page-about .about-hero__keys {
  list-style: none;
  margin: clamp(20px, 4vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  border: var(--about-rule);
  background: var(--ky-grid);
}

.page-about .about-hero__key {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 12px 14px;
  background: var(--ky-hull);
}

.page-about .about-hero__key-mark {
  color: var(--ky-cyan);
  font-size: 0.86rem;
  letter-spacing: 0.08em;
  border: 1px solid var(--ky-grid-hi);
  padding: 2px 7px;
}

.page-about .about-hero__key-label {
  font-size: 0.94rem;
  color: var(--ky-white);
}

.page-about .about-hero__cta {
  margin: clamp(22px, 4vw, 34px) 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero__visual {
  position: relative;
  margin-inline: auto;
  width: 100%;
  max-width: 460px;
  aspect-ratio: 1 / 1;
  border: var(--about-rule);
  background:
    radial-gradient(circle at 50% 46%, rgba(47, 243, 210, 0.1), transparent 64%),
    var(--ky-hull);
  box-shadow: var(--ky-shadow-hard);
}

.page-about .about-hero__svg {
  display: block;
  width: 100%;
  height: 100%;
}

.page-about .about-hero__visual-cap {
  position: absolute;
  left: 12px;
  bottom: 10px;
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--ky-grid-hi);
}

/* ================= 横幅图 ================= */
.page-about .about-banner {
  margin: 0 0 clamp(28px, 5vw, 52px);
}

.page-about .about-banner .ky-figure__frame {
  border: var(--about-rule);
  box-shadow: var(--ky-shadow-hard);
}

.page-about .about-banner .ky-figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 16 / 7;
}

.page-about .ky-figure__caption {
  margin-top: 10px;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--ky-body);
}

/* ================= 章节索引 ================= */
.page-about .about-jump-wrap {
  padding-bottom: clamp(24px, 4vw, 44px);
}

.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px;
  border: var(--about-rule);
  background: var(--ky-hull);
}

.page-about .about-jump__item {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 13px;
  font-size: 0.9rem;
  color: var(--ky-body);
  text-decoration: none;
  border: 1px solid var(--ky-grid);
  background: var(--ky-void);
  transition: color 0.2s var(--ky-ease), border-color 0.2s var(--ky-ease), background 0.2s var(--ky-ease);
}

.page-about .about-jump__item .ky-mono {
  font-size: 0.78rem;
  color: var(--ky-grid-hi);
  letter-spacing: 0.1em;
}

.page-about .about-jump__item:hover,
.page-about .about-jump__item:focus-visible {
  color: var(--ky-void);
  background: var(--ky-cyan);
  border-color: var(--ky-cyan);
  outline: none;
}

.page-about .about-jump__item:hover .ky-mono,
.page-about .about-jump__item:focus-visible .ky-mono {
  color: var(--ky-void);
}

/* ================= 章节通用 ================= */
.page-about .about-chapter {
  scroll-margin-top: calc(var(--ky-header-h) + 28px);
}

.page-about .about-chapter__index {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .about-chapter__title {
  margin: 10px 0 0;
  max-width: 24ch;
  font-family: var(--ky-font-display);
  font-size: clamp(1.45rem, 4.6vw, 2.35rem);
  line-height: 1.22;
  letter-spacing: -0.008em;
  color: var(--ky-white);
  font-weight: 700;
}

.page-about .about-chapter__body {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  margin-top: clamp(22px, 4vw, 38px);
}

.page-about .about-chapter__prose p {
  margin: 0 0 1.05em;
  max-width: 68ch;
  font-size: 1rem;
  line-height: 1.9;
}

.page-about .about-chapter__prose p:last-child {
  margin-bottom: 0;
}

/* ---------- 概况事实卡 ---------- */
.page-about .about-facts {
  align-self: start;
  border: var(--about-rule);
  background: var(--ky-hull);
  padding: var(--about-pad);
  box-shadow: var(--ky-shadow-hard);
}

.page-about .about-facts__title {
  margin: 0 0 14px;
  font-family: var(--ky-font-display);
  font-size: 0.92rem;
  letter-spacing: 0.18em;
  color: var(--ky-cyan);
  font-weight: 600;
}

.page-about .about-facts__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 14px;
  padding: 10px 0;
  border-bottom: 1px solid var(--ky-grid);
}

.page-about .about-facts__row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-facts__k {
  font-size: 0.9rem;
  color: var(--ky-body);
}

.page-about .about-facts__v {
  font-family: var(--ky-font-mono);
  font-size: 0.92rem;
  color: var(--ky-white);
  text-align: right;
}

/* ================= 色带 ================= */
.page-about .about-strip {
  border-top: var(--about-rule);
  border-bottom: var(--about-rule);
  padding: clamp(16px, 3.4vw, 26px) 0;
}

.page-about .about-strip--cyan {
  background:
    linear-gradient(90deg, rgba(47, 243, 210, 0.14), rgba(47, 243, 210, 0) 68%),
    var(--ky-hull);
}

.page-about .about-strip--amber {
  background:
    linear-gradient(90deg, rgba(255, 197, 61, 0.13), rgba(255, 197, 61, 0) 68%),
    var(--ky-hull);
}

.page-about .about-strip__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px 18px;
}

.page-about .about-strip__tag {
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  color: var(--ky-void);
  background: var(--ky-cyan);
  padding: 4px 10px;
}

.page-about .about-strip--amber .about-strip__tag {
  background: var(--ky-amber);
}

.page-about .about-strip__text {
  margin: 0;
  font-size: clamp(0.98rem, 2.6vw, 1.15rem);
  color: var(--ky-white);
  line-height: 1.6;
}

/* ================= 版本时间轴 ================= */
.page-about .about-timeline__grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  margin-top: clamp(24px, 4vw, 40px);
}

.page-about .about-spine {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-spine::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: var(--ky-grid);
}

.page-about .about-spine__item {
  position: relative;
  padding: 0 0 26px 40px;
  transition: transform 0.25s var(--ky-ease);
}

.page-about .about-spine__item:last-child {
  padding-bottom: 0;
}

.page-about .about-spine__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 16px;
  height: 16px;
  background: var(--ky-cyan);
  box-shadow: 0 0 0 3px var(--ky-void), 0 0 0 5px var(--ky-grid);
  transition: background 0.25s var(--ky-ease), box-shadow 0.25s var(--ky-ease);
}

.page-about .about-spine__year {
  display: block;
  font-size: 1.02rem;
  letter-spacing: 0.12em;
  color: var(--ky-cyan);
}

.page-about .about-spine__note {
  margin: 7px 0 0;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--ky-body);
}

.page-about .about-spine__item:hover,
.page-about .about-spine__item:focus-within {
  transform: translateX(5px);
}

.page-about .about-spine__item:hover::before,
.page-about .about-spine__item:focus-within::before {
  background: var(--ky-orange);
  box-shadow: 0 0 0 3px var(--ky-void), 0 0 0 5px var(--ky-cyan);
}

.page-about .about-timeline__side {
  display: grid;
  gap: clamp(18px, 3vw, 26px);
  align-content: start;
}

.page-about .about-ring {
  margin: 0;
}

.page-about .about-ring .ky-figure__frame {
  border: var(--about-rule);
  background: var(--ky-hull);
}

.page-about .about-ring .ky-figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-about .about-legend-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  border: var(--about-rule);
  background: var(--ky-grid);
}

.page-about .about-legend-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--ky-hull);
  font-size: 0.9rem;
  color: var(--ky-body);
}

.page-about .about-legend-list__dot {
  flex: none;
  width: 10px;
  height: 10px;
}

.page-about .about-legend-list__dot--cyan {
  background: var(--ky-cyan);
}

.page-about .about-legend-list__dot--amber {
  background: var(--ky-amber);
}

.page-about .about-legend-list__dot--orange {
  background: var(--ky-orange);
}

.page-about .about-legend-list__dot--violet {
  background: var(--ky-violet);
}

/* ================= 团队 ================= */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  margin-top: clamp(24px, 4vw, 40px);
}

.page-about .about-team__figure {
  margin: 0;
}

.page-about .about-team__figure .ky-figure__frame {
  border: var(--about-rule);
  box-shadow: var(--ky-shadow-hard);
}

.page-about .about-team__figure .ky-figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-team__lede {
  margin: 0 0 clamp(18px, 3vw, 26px);
  font-size: 1.02rem;
  line-height: 1.9;
  color: var(--ky-white);
}

.page-about .about-roles {
  list-style: none;
  margin: 0 0 clamp(18px, 3vw, 26px);
  padding: 0;
  display: grid;
  gap: 1px;
  border: var(--about-rule);
  background: var(--ky-grid);
}

.page-about .about-roles__item {
  position: relative;
  padding: 16px 16px 16px 54px;
  background: var(--ky-hull);
  transition: background 0.22s var(--ky-ease);
}

.page-about .about-roles__item:hover {
  background: var(--ky-hull-2);
}

.page-about .about-roles__idx {
  position: absolute;
  left: 14px;
  top: 16px;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.82rem;
  color: var(--ky-void);
  background: var(--ky-cyan);
}

.page-about .about-roles__item:nth-child(2) .about-roles__idx {
  background: var(--ky-amber);
}

.page-about .about-roles__item:nth-child(3) .about-roles__idx {
  background: var(--ky-violet);
}

.page-about .about-roles__name {
  margin: 0 0 6px;
  font-family: var(--ky-font-display);
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  color: var(--ky-white);
  font-weight: 600;
}

.page-about .about-roles__desc {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--ky-body);
}

.page-about .about-team__foot {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.9;
  color: var(--ky-body);
  border-left: 3px solid var(--ky-orange);
  padding-left: 14px;
}

/* ================= 覆盖数据 ================= */
.page-about .about-coverage__lede {
  margin: clamp(16px, 3vw, 22px) 0 0;
  max-width: 70ch;
  font-size: 1rem;
  line-height: 1.9;
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(22px, 4vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  border: var(--about-rule);
  background: var(--ky-grid);
}

.page-about .about-stats__item {
  padding: clamp(16px, 3vw, 22px);
  background: var(--ky-hull);
  display: grid;
  align-content: start;
  gap: 4px;
  transition: background 0.22s var(--ky-ease);
}

.page-about .about-stats__item:hover {
  background: var(--ky-hull-2);
}

.page-about .about-stats__num {
  font-size: clamp(1.9rem, 7vw, 2.6rem);
  font-weight: 700;
  color: var(--ky-cyan);
  line-height: 1;
  letter-spacing: -0.02em;
}

.page-about .about-stats__item:nth-child(2n) .about-stats__num {
  color: var(--ky-white);
}

.page-about .about-stats__unit {
  font-size: 0.55em;
  margin-left: 2px;
  color: inherit;
}

.page-about .about-stats__label {
  font-size: 0.94rem;
  color: var(--ky-white);
  letter-spacing: 0.02em;
}

.page-about .about-stats__desc {
  margin: 6px 0 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--ky-body);
}

/* ================= 更新节奏 ================= */
.page-about .about-cadence {
  list-style: none;
  margin: clamp(22px, 4vw, 34px) 0 0;
  padding: 0;
  border-top: var(--about-rule);
}

.page-about .about-cadence__item {
  display: grid;
  gap: 8px;
  padding: clamp(16px, 3vw, 22px) 0;
  border-bottom: var(--about-rule);
}

.page-about .about-cadence__time {
  display: inline-block;
  justify-self: start;
  font-size: 0.86rem;
  letter-spacing: 0.14em;
  color: var(--ky-void);
  background: var(--ky-amber);
  padding: 4px 10px;
}

.page-about .about-cadence__item:nth-child(1) .about-cadence__time {
  background: var(--ky-cyan);
}

.page-about .about-cadence__item:nth-child(2) .about-cadence__time {
  background: var(--ky-orange);
  color: var(--ky-white);
}

.page-about .about-cadence__item:nth-child(3) .about-cadence__time {
  background: var(--ky-violet);
  color: var(--ky-white);
}

.page-about .about-cadence__name {
  margin: 0 0 5px;
  font-family: var(--ky-font-display);
  font-size: 1.1rem;
  letter-spacing: 0.03em;
  color: var(--ky-white);
  font-weight: 600;
}

.page-about .about-cadence__body p {
  margin: 0;
  max-width: 68ch;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--ky-body);
}

.page-about .about-support {
  margin-top: clamp(26px, 4vw, 40px);
  padding: var(--about-pad);
  border: var(--about-rule);
  border-left: 4px solid var(--ky-orange);
  background: var(--ky-hull);
}

.page-about .about-support__title {
  margin: 0 0 10px;
  font-family: var(--ky-font-display);
  font-size: 1.15rem;
  color: var(--ky-white);
  font-weight: 600;
}

.page-about .about-support p {
  margin: 0 0 10px;
  max-width: 70ch;
  font-size: 0.94rem;
  line-height: 1.85;
}

.page-about .about-support__mail {
  color: var(--ky-cyan);
  font-size: 0.98rem;
  letter-spacing: 0.02em;
}

.page-about .about-support__link {
  margin-top: 6px;
  margin-bottom: 0;
}

.page-about .about-support__link a {
  color: var(--ky-amber);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-about .about-support__link a:hover {
  color: var(--ky-white);
}

/* ================= 结尾行动区 ================= */
.page-about .about-cta {
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about .about-cta__inner {
  display: grid;
  gap: clamp(22px, 4vw, 34px);
  padding: var(--about-pad);
  border: var(--about-rule);
  background:
    linear-gradient(135deg, rgba(47, 243, 210, 0.12), rgba(124, 92, 255, 0.08) 60%, transparent),
    var(--ky-hull);
  box-shadow: var(--ky-shadow-hard);
}

.page-about .about-cta__title {
  margin: 10px 0 12px;
  font-family: var(--ky-font-display);
  font-size: clamp(1.4rem, 4.4vw, 2.1rem);
  line-height: 1.25;
  color: var(--ky-white);
  font-weight: 700;
}

.page-about .about-cta__copy p {
  margin: 0;
  max-width: 62ch;
  font-size: 0.98rem;
  line-height: 1.85;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

/* ================= 响应式 ================= */
@media (min-width: 620px) {
  .page-about .about-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-cadence__item {
    grid-template-columns: minmax(84px, 110px) minmax(0, 1fr);
    align-items: start;
    gap: 20px;
  }

  .page-about .about-cadence__time {
    justify-self: stretch;
    text-align: center;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: center;
  }

  .page-about .about-hero__visual {
    margin-inline: 0 0;
    max-width: none;
  }

  .page-about .about-chapter__body {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-timeline__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 0.9fr);
    align-items: center;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero__title {
    font-size: 3.9rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-spine__item,
  .page-about .about-spine__item::before,
  .page-about .about-jump__item,
  .page-about .about-roles__item,
  .page-about .about-stats__item {
    transition: none;
  }

  .page-about .about-spine__item:hover,
  .page-about .about-spine__item:focus-within {
    transform: none;
  }
}